the thing is, having red or purple eyes wouldnt be all that realistic. people with albinism dont have red or purple eyes. sure they can look red or purple under the right lighting, but theyll still be any other natural eye color humans can have. white hair also doesnt seem to be accurate(when talking about albinism in humans). the hair at its lightest is still blonde, so an inclusion of extremely light blonde hair would be better(for an albino option) than pure white.
the choice to make a character albino(along with other conditions and heterochromia like u stated) should be included. if im wrong about anything please correct me